/*
 * Copyright 2008 Carnegie Mellon University
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *  
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, 
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package edu.cmu.lti.sepia.api.processor;

import javax.servlet.http.HttpServletRequest;

import org.json.JSONObject;

import edu.cmu.lti.sepia.api.json.JsonAction;
import edu.cmu.lti.sepia.data.db.SQL;
import edu.cmu.lti.sepia.data.db.TaskDAO;
import edu.cmu.lti.sepia.infra.topic.model.Task;
import edu.cmu.lti.sepia.util.ExceptionUtil;
import edu.cmu.lti.sepia.util.ServletUtil;

public class TaskProcessor extends AbstractProcessor {
	
	@Override
	public JSONObject process( SQL sql, JsonAction action, HttpServletRequest request ) {
		ServletUtil servletUtil = new ServletUtil( request );

    String taskNameShort = servletUtil.readString("taskNameShort", "");
    Task task = TaskDAO.parseRequest(request);

    JSONObject json = new JSONObject();
    try {
      json.put("msg", "succeeded");

      if (action.equals(JsonAction.GetTasks)) {
        json = TaskDAO.convertTasks(TaskDAO.getTasks(sql));
      } else if (action.equals(JsonAction.GetTask)) {
        json = TaskDAO.convertTask(TaskDAO.findByTaskNameShort(sql, taskNameShort));
      } else if (action.equals(JsonAction.AddTask)) {
        // String msg =
        TaskDAO.addTask(sql, task.getTaskNameShort());
        json = TaskDAO.convertTask(TaskDAO.findLatest(sql));
      } else if (action.equals(JsonAction.UpdateTask)) {
        TaskDAO.updateTask(sql, task);
        // TODO: if taskShortName is updated, task db also needs to be updated.
      } else if (action.equals(JsonAction.DeleteTask)) {
        TaskDAO.deleteTaskByTaskNameShort(sql, taskNameShort);
      }
    } catch (Exception e) {
      e.printStackTrace();
      try {
        json.put("exception", ExceptionUtil.exceptionToString(e));
      } catch (Exception e2) {
        e2.printStackTrace();
      }
    }
    return json;
  }
	
}
